- Jidd Ḥafṣī, ʻAlī ibn Luṭf Allāh, active 17th century-18th century1
- Jinn1
- John, of Damascus, Saint1
- Joseph (Son of Jacob)1
- Joseph (Son of Jacob) in the Qurʼan1
- Joseph Della Reina, active 15th century1
- Juhd al-muqill (Sājaqlīzādah, Muḥammad ibn Abī Bakr)1
- Jādarī, ʻAbd al-Raḥmān ibn Abī Ghālib, 1384 or 1385-1435 or 1436. Rawḍat al-azhār fī ʻilm waqt al-layl wa-al-nahār1
- Jāmiʻ al-ṣaghīr (Suyūṭī)1
- Jāmiʻ al-ṣaḥīḥ (Muslim ibn al-Ḥajjāj al-Qushayrī)1
- Jāmī, 1414-14921
- Jāmī, 1414-1492. Muʻammayāt asmāʾ al-ḥusná1
- Jārabardī, Aḥmad ibn al-ḥusayn, d. 1346. Sharḥ al-Shāfiyah1
- Jārūdī, Nāṣir ibn Muḥammad, active 18th century1
- Jīlī, ʻAbd al-Karīm ibn Ibrāhīm, 1365 or 1366- Risālat al-Tawḥīd1
- Kabāʼir (Muḥammad ibn ʻAbd al-Wahhāb)1
- Kalanbawī, Ismāʻīl ibn Muṣṭafá, -1790 or 1791. Burhān fī ʻilm al-mīzān1
- Kamāl al-Dīn Muḥammad ibn Muḥammad, -1418. Naẓm Nukhbat al-fikar fī muṣṭalaḥ ahl al-athar1
- Kansas--Lawrence1
- Karaite philosophy1